[INFO] fetching crate maroon 0.1.0...
[INFO] testing maroon-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate maroon 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate maroon 0.1.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate maroon 0.1.0
[INFO] finished tweaking crates.io crate maroon 0.1.0
[INFO] tweaked toml for crates.io crate maroon 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate maroon 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f208a98ae289acb959986d0c4a6aaccad11578c0cebb7051af7d45937303348f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f208a98ae289acb959986d0c4a6aaccad11578c0cebb7051af7d45937303348f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f208a98ae289acb959986d0c4a6aaccad11578c0cebb7051af7d45937303348f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f208a98ae289acb959986d0c4a6aaccad11578c0cebb7051af7d45937303348f", kill_on_drop: false }`
[INFO] [stdout] f208a98ae289acb959986d0c4a6aaccad11578c0cebb7051af7d45937303348f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc38286f870627b0d5bfc7b7edee0d10e5138a90c4e825faff854a6600a3fcf8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dc38286f870627b0d5bfc7b7edee0d10e5138a90c4e825faff854a6600a3fcf8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling maroon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:114:3
[INFO] [stdout]     |
[INFO] [stdout] 101 | /   loop {
[INFO] [stdout] 102 | |     match tokens.peek() {
[INFO] [stdout] 103 | |       Some(Token::CBRACKET(line)) => {
[INFO] [stdout] 104 | |         tokens.next();
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     };
[INFO] [stdout] 113 | |   }
[INFO] [stdout]     | |___- any code following this expression is unreachable
[INFO] [stdout] 114 |     Err(ParseError::Unknown(2))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:133:3
[INFO] [stdout]     |
[INFO] [stdout] 120 | /   loop {
[INFO] [stdout] 121 | |     match tokens.peek() {
[INFO] [stdout] 122 | |       Some(Token::CPAREN(line)) => {
[INFO] [stdout] 123 | |         tokens.next();
[INFO] [stdout] ...   |
[INFO] [stdout] 131 | |     };
[INFO] [stdout] 132 | |   }
[INFO] [stdout]     | |___- any code following this expression is unreachable
[INFO] [stdout] 133 |     Err(ParseError::Unknown(3))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fndec`
[INFO] [stdout]    --> src/parser.rs:151:19
[INFO] [stdout]     |
[INFO] [stdout] 151 |               let fndec = stmt[0].clone();
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_fndec`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `builtins`
[INFO] [stdout]   --> src/parser.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | / const builtins: &'static [&'static str] = &[
[INFO] [stdout] 17 | |   ".", ":", "+", "-", "*", "/", "//", "^", "pow", "sqrt",
[INFO] [stdout] 18 | |   "and", "or", "not", "==", "!=", "&&", "||", "!",
[INFO] [stdout] 19 | |   "print", "type"
[INFO] [stdout] 20 | | ];
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `keywords` should have an upper case name
[INFO] [stdout]   --> src/parser.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const keywords: &'static [&'static str] = &[
[INFO] [stdout]    |       ^^^^^^^^ help: convert the identifier to upper case: `KEYWORDS`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `builtins` should have an upper case name
[INFO] [stdout]   --> src/parser.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const builtins: &'static [&'static str] = &[
[INFO] [stdout]    |       ^^^^^^^^ help: convert the identifier to upper case: `BUILTINS`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `Command { std: "docker" "inspect" "dc38286f870627b0d5bfc7b7edee0d10e5138a90c4e825faff854a6600a3fcf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc38286f870627b0d5bfc7b7edee0d10e5138a90c4e825faff854a6600a3fcf8", kill_on_drop: false }`
[INFO] [stdout] dc38286f870627b0d5bfc7b7edee0d10e5138a90c4e825faff854a6600a3fcf8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78cb444f4eb8809b2eb2d782697b964bf1a0b08e6ecc4d3fde22b28ab9804858
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "78cb444f4eb8809b2eb2d782697b964bf1a0b08e6ecc4d3fde22b28ab9804858", kill_on_drop: false }`
[INFO] [stderr]    Compiling maroon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:114:3
[INFO] [stdout]     |
[INFO] [stdout] 101 | /   loop {
[INFO] [stdout] 102 | |     match tokens.peek() {
[INFO] [stdout] 103 | |       Some(Token::CBRACKET(line)) => {
[INFO] [stdout] 104 | |         tokens.next();
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     };
[INFO] [stdout] 113 | |   }
[INFO] [stdout]     | |___- any code following this expression is unreachable
[INFO] [stdout] 114 |     Err(ParseError::Unknown(2))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:133:3
[INFO] [stdout]     |
[INFO] [stdout] 120 | /   loop {
[INFO] [stdout] 121 | |     match tokens.peek() {
[INFO] [stdout] 122 | |       Some(Token::CPAREN(line)) => {
[INFO] [stdout] 123 | |         tokens.next();
[INFO] [stdout] ...   |
[INFO] [stdout] 131 | |     };
[INFO] [stdout] 132 | |   }
[INFO] [stdout]     | |___- any code following this expression is unreachable
[INFO] [stdout] 133 |     Err(ParseError::Unknown(3))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fndec`
[INFO] [stdout]    --> src/parser.rs:151:19
[INFO] [stdout]     |
[INFO] [stdout] 151 |               let fndec = stmt[0].clone();
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_fndec`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `builtins`
[INFO] [stdout]   --> src/parser.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | / const builtins: &'static [&'static str] = &[
[INFO] [stdout] 17 | |   ".", ":", "+", "-", "*", "/", "//", "^", "pow", "sqrt",
[INFO] [stdout] 18 | |   "and", "or", "not", "==", "!=", "&&", "||", "!",
[INFO] [stdout] 19 | |   "print", "type"
[INFO] [stdout] 20 | | ];
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `keywords` should have an upper case name
[INFO] [stdout]   --> src/parser.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const keywords: &'static [&'static str] = &[
[INFO] [stdout]    |       ^^^^^^^^ help: convert the identifier to upper case: `KEYWORDS`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `builtins` should have an upper case name
[INFO] [stdout]   --> src/parser.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const builtins: &'static [&'static str] = &[
[INFO] [stdout]    |       ^^^^^^^^ help: convert the identifier to upper case: `BUILTINS`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "78cb444f4eb8809b2eb2d782697b964bf1a0b08e6ecc4d3fde22b28ab9804858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78cb444f4eb8809b2eb2d782697b964bf1a0b08e6ecc4d3fde22b28ab9804858", kill_on_drop: false }`
[INFO] [stdout] 78cb444f4eb8809b2eb2d782697b964bf1a0b08e6ecc4d3fde22b28ab9804858
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b59a15baaa7d5cac3c823d47886cb49034b3bb771ad7d3c5954a57f74e642c45
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b59a15baaa7d5cac3c823d47886cb49034b3bb771ad7d3c5954a57f74e642c45", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/parser.rs:114:3
[INFO] [stderr]     |
[INFO] [stderr] 101 | /   loop {
[INFO] [stderr] 102 | |     match tokens.peek() {
[INFO] [stderr] 103 | |       Some(Token::CBRACKET(line)) => {
[INFO] [stderr] 104 | |         tokens.next();
[INFO] [stderr] ...   |
[INFO] [stderr] 112 | |     };
[INFO] [stderr] 113 | |   }
[INFO] [stderr]     | |___- any code following this expression is unreachable
[INFO] [stderr] 114 |     Err(ParseError::Unknown(2))
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/parser.rs:133:3
[INFO] [stderr]     |
[INFO] [stderr] 120 | /   loop {
[INFO] [stderr] 121 | |     match tokens.peek() {
[INFO] [stderr] 122 | |       Some(Token::CPAREN(line)) => {
[INFO] [stderr] 123 | |         tokens.next();
[INFO] [stderr] ...   |
[INFO] [stderr] 131 | |     };
[INFO] [stderr] 132 | |   }
[INFO] [stderr]     | |___- any code following this expression is unreachable
[INFO] [stderr] 133 |     Err(ParseError::Unknown(3))
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `fndec`
[INFO] [stderr]    --> src/parser.rs:151:19
[INFO] [stderr]     |
[INFO] [stderr] 151 |               let fndec = stmt[0].clone();
[INFO] [stderr]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_fndec`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `builtins`
[INFO] [stderr]   --> src/parser.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | / const builtins: &'static [&'static str] = &[
[INFO] [stderr] 17 | |   ".", ":", "+", "-", "*", "/", "//", "^", "pow", "sqrt",
[INFO] [stderr] 18 | |   "and", "or", "not", "==", "!=", "&&", "||", "!",
[INFO] [stderr] 19 | |   "print", "type"
[INFO] [stderr] 20 | | ];
[INFO] [stderr]    | |__^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `keywords` should have an upper case name
[INFO] [stderr]   --> src/parser.rs:13:7
[INFO] [stderr]    |
[INFO] [stderr] 13 | const keywords: &'static [&'static str] = &[
[INFO] [stderr]    |       ^^^^^^^^ help: convert the identifier to upper case: `KEYWORDS`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `builtins` should have an upper case name
[INFO] [stderr]   --> src/parser.rs:16:7
[INFO] [stderr]    |
[INFO] [stderr] 16 | const builtins: &'static [&'static str] = &[
[INFO] [stderr]    |       ^^^^^^^^ help: convert the identifier to upper case: `BUILTINS`
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/maroon-f83437edbf8fac52
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b59a15baaa7d5cac3c823d47886cb49034b3bb771ad7d3c5954a57f74e642c45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b59a15baaa7d5cac3c823d47886cb49034b3bb771ad7d3c5954a57f74e642c45", kill_on_drop: false }`
[INFO] [stdout] b59a15baaa7d5cac3c823d47886cb49034b3bb771ad7d3c5954a57f74e642c45